Comparison of the Masaoka-Koga and The IASLC/ITMIG Proposal for The TNM Staging Systems Based on the Chinese Alliance for Research in Thymomas (ChART) Retrospective Database
10.3779/j.issn.1009-3419.2016.07.04
- VernacularTitle:基于中国胸腺瘤协作组回顾性数据库对比Masaoka-Koga分期和国际肺癌协会/国际胸腺肿瘤协作组提出的TNM分期系统
- Author:
LIANG GUANGHUI
;
GU ZHITAO
;
Li YIN
;
FU JIANHUA
;
Shen YI
;
WEI YUCHENG
;
TAN LIJIE
;
ZHANG PENG
;
HAN YONGTAO
;
CHEN CHUN
;
ZHANG RENQUAN
;
CHEN KE-NENG
;
CHEN HEZHONG
;
LIU YONGYU
;
CUI YOUBING
;
WANG YUN
;
PANG LIEWEN
;
YU ZHENTAO
;
ZHOU XINMING
;
LIU YANGCHUN
;
LIU YUAN
;
FANG WENTAO
- Keywords:
Thymoma;
Staging;
Prognostic grouping
- From:
Chinese Journal of Lung Cancer
2016;19(7):425-436
- CountryChina
- Language:Chinese
-
Abstract:
Background and objectiveTo compare the predictive effect of the Masaoka-Koga staging system and the International Association for the Study of Lung Cancer (IASLC)/the International Thymic Malignancies Interest Group (ITMIG) proposal for the new TNM staging on prognosis of thymic malignancies using the Chinese Alliance for Research in Thymomas (ChART) retrospective database.MethodsFrom 1992 to 2012, 2,370 patients in ChART database were ret-rospectively reviewed. Of these, 1,198 patients with complete information on TNM stage, Masaoka-Koga stage, and survival were used for analysis. Cumulative incidence of recurrence (CIR) was assessed in R0 patients. Overall survival (OS) was evalu-ated both in an R0 resected cohort, as well as in all patients (any R status). CIR and OS were ifrst analyzed according to the Masaoka-Koga staging system. Then, they were compared using the new TNM staging proposal.Results Based on Masaoka-Koga staging system, signiifcant difference was detected in CIR among all stages. However, No survival difference was revealed between stage I and II, or between stage II and III. Stage IV carried the highest risk of recurrence and worst survival. According to the new TNM staging proposal, CIR in T1a was signiifcantly lower comparing to all other T categories (P<0.05) and there is a signiifcant difference in OS between T1a and T1b (P=0.004). T4 had the worst OS comparing to all other T categories. CIR and OS were signiifcantly worse in N(+) than in N0 patients. Signiifcant difference in CIR and OS was detected between M0 and M1b, but not between M0 and M1a. OS was almost always statistically different when comparison was made between stages I-IIIa and stages IIIb-IVb. However, no statistical difference could be detected among stages IIIb to IVb.Conclusion Compared with Masaoka-Koga staging, the IASLC/ITMIG TNM staging proposal not only describes the extent of tumor invasion but also provides information on lymphatic involvement and tumor dissemination. Further study using prospectively recorded information on the proposed TNM categories would be helpful to better grouping thymic tumors for predicting prognosis and guiding clinical management.
